Tuyere and supporting grate therefor



April 14, 1931. J PALDA JR 1,800,747

TUYEIRE AND SUPPORTING GRATE THEREFOR Filed Feb. 8, 1929 s Sheets-Sheet 1 V V 4 A &-\ m J fi "a .Zao c/fFa/a a JP:

A tiorney Inventor April 14, 1931- J. PALDA. JR 1,800,747

TUYERE AND SUPPORTING GRATE THEREFOR Filed Feb. 8, 1929 3 Sheets-Sheet 2 I I inunfor 70 4 Zea JlZ a/da JE pmm 24 V Attorney April 14, 1931. v PALDA J 1,800,747

TUYERE AND SUPPORTING GRATE THEREFOR Filed Feb. 8, 1929 3 Sheetsf3heet 3 1 f P-1 1 r r 1 l Inventor Attorney Patented dlpro lid, i315,

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LEO I. EALDA, JR, 015 MINOT, NORTH DAKOTA.

rn rnnn AND snrronrrne enarn 'rnnnnron Application filed February 8, 1929. serial No. 3%,a78.

The present invention relates to a tuyere and supporting grate therefor and the object and advantages of the invention will become apparent as the description proceeds when t considered in connection with the accompanying drawings, wherein:

Figure l is a vertical section through the tuyere and the supporting grate associated therewith,

Figure 2 is a top plan view of the tuyere Figure 3 is a top plan view of the top grate ring disk,

Figure 4 is an edge elevation thereof,

Figure 5 is a detail view of the edge showing the shaker bar recess,

Figure dis a top plan view of the bottom or lower rate ring disk, and Figure% is a side elevation thereof.

Referring to the drawing it will be seen the tuyere is in the form of a casting and includes a frusto-conical body 5 merging into a cylindrical skirt the exterior diameter of which is lessthan the lower end of the body 5 so as to form an annular shoulder '2'. The upper end of the body 5 merges into a downwardly and inwardly extending conduit 8 curving outwardly through the skirt forming a socket 9 to receive coal pipes.

An air inlet 10 is provided in the side or" llil the skirt adjacent the socket 9. The-body 5 is provided with a plurality of horizontal openings as indicated at 12, said openings being oi arcuate formation and arranged in coaxial series.

A lower ring disk like grate 15 rests on flanges 16 being anchored in place as at 1?. Radial slots 18 are formed in this lower grate 15. The lower grate is formed in two sections having interlocking connections 19. The numeral 20 denotes an upper ring disk like'grate resting on the grate l5 and disposed about the lower end of the body 5, it being noted that the shoulder 7 rests on the inner portion of the grate 15. This grate 20 is formed with radial slots 21 which may be placed into or out of registry with slots 18.

Interlocking connections 22 are provided between the sections of the rate 20. A portion of the grate 20 is provi ed with a shaker receiving recess 24;.

vchamber formedin the casting and the horizontal passages through the air vents or openings 12 so that no ashes or fuel can drop into the chamber. a

With the use of this tuyere air is not blown through the ash box or ash receptacle but comes in with no possibility of blowing ashes or dust out of the furnace or steam plant. The grate arrangement of the two plates one above the other is important in that the upper is movable so as to make a natural air draft or to drop the ashes. I

The arrangement is such that slack or dust can be burned without dropping the unburned fuel and may be used in connection with the tuyere which I have described.

It is thought that the construction, utility and advantages of this invention will now be quite apparent to those skilled in this art without amore detail description. The present embodiment of the invention has been disclosed in considerable detail merely for the purposes of exemplification since in actual practice it attains the features of advantage enumerated as desirable in the statement of the invention and the above description.

lit will be apparent that changes in the details of construction, and in the combination and arrangement of parts may be resorted to without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advantages.

' Having thus described my invention, what I claim as new is: a

A tuyere and supporting grate therefor of the character described comprising a fixed, sectional, fiat grate disk having a central opening, a shiftable, sectional giate disk mounted co-axially on the fixed grate disk in superposed relation thereto and having a centrally disposed opening of greater diame-' ter than the opening in sald fixed disk, and a tuy the teeogm ere removably disposed in the opening in fiat disk comprising a, substantially frusto-conical 'portion,-a. dependin skirt portion of less diameter than the a aGent end of the frusto-"conical portion providing an annular shoulder for engagement on the xed disk for supporting the tuyere thereon, the shiftable disk encircling the lower end portion of the frusto-conical 'portion of the m tuyere and adapted In testimony whe to rotate there'around, reof I afiix m si nature. LEO J. P D ,Jn. 

